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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, in Atwater, Illinois, is an icy winter month, with temperature in the range of an average low of 22.3°F (-5.4°C) and an average high of 34.2°F (1.2°C). January is Atwater's coldest month, registering average high temperatures of 34.2°F (1.2°C) and lows of 22.3°F (-5.4°C). Weather in January »
Weather in February
February, the last month of the winter in Atwater, is another cold month, with an average temperature varying between 39.4°F (4.1°C) and 25.3°F (-3.7°C). Atwater's weather in February, with an average high-temperature of a still wintry 39.4°F (4.1°C), subtly shifts from January's 34.2°F (1.2°C). Weather in February »
Weather in March
The first month of the spring, March, is a fresh month in Atwater, Illinois, with an average temperature fluctuating between 36.1°F (2.3°C) and 52°F (11.1°C). Atwater's March weather brings a rise in high-temperatures, moving from an icy 39.4°F (4.1°C) in February to a cool 52°F (11.1°C). Weather in March »
Weather in April
April is an enjoyable spring month in Atwater, Illinois, with an average temperature fluctuating between 63.5°F (17.5°C) and 46.4°F (8°C). The shift into April is characterized by a rise in the average high-temperature, transitioning from March's fresh 52°F (11.1°C) to an enjoyable 63.5°F (17.5°C). Weather in April »
Weather in May
May, the last month of the spring in Atwater, is a pleasant month, with an average temperature fluctuating between 56.8°F (13.8°C) and 73.2°F (22.9°C). With the beginning of May, Atwater's average high-temperature sees an increase, transitioning from a comfortable 63.5°F (17.5°C) in April to a pleasant 73.2°F (22.9°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Atwater, Illinois, with an average temperature ranging between max 81.7°F (27.6°C) and min 64.9°F (18.3°C). The arrival of June brings a soft temperature shift, with the average high-temperature nudging from an agreeable 73.2°F (22.9°C) in May to a moderately hot 81.7°F (27.6°C). Weather in June »
Weather in July
July, like June, in Atwater, Illinois, is another warm summer month, with an average temperature varying between 66.7°F (19.3°C) and 83.3°F (28.5°C). July, with its high-temperature average of 83.3°F (28.5°C) and a low-temperature average of 66.7°F (19.3°C), is the warmest month. July's average heat index is evaluated at a hot 93.2°F (34°C). Weather in July »
Weather in August
August, the last month of the summer in Atwater, is also a moderately hot month, with temperature in the range of an average high of 82.2°F (27.9°C) and an average low of 64.9°F (18.3°C). The high-temperature average in August for Atwater is a still warm 82.2°F (27.9°C), staying closely aligned with July's conditions. Weather in August »
Weather in September
September, the first month of the autumn in Atwater, is still a warm month, with an average temperature ranging between min 59.4°F (15.2°C) and max 77.7°F (25.4°C). Atwater in September witnesses an average high-temperature of a still warm 77.7°F (25.4°C), indicating a slight variation from August's 82.2°F (27.9°C). Weather in September »
Weather in October
October, the same as September, is another comfortable autumn month in Atwater, Illinois, with an average temperature fluctuating between 64.4°F (18°C) and 48.2°F (9°C). October's onset corresponds with a shift in the average high-temperature, moving from a warm 77.7°F (25.4°C) in September to a comfortable 64.4°F (18°C). Weather in October »
Weather in November
November, the last month of the autumn in Atwater, is also a fresh month, with an average temperature varying between 36.5°F (2.5°C) and 50.9°F (10.5°C). With the onset of November, Atwater experiences a modest temperature adjustment, with the average high-temperature receding from a comfortable 64.4°F (18°C) in October to a cool 50.9°F (10.5°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Atwater, Illinois, with an average temperature ranging between min 28.6°F (-1.9°C) and max 39.7°F (4.3°C). Start of December brings a shift in the average high-temperature, falling from November's cool 50.9°F (10.5°C) to a wintry 39.7°F (4.3°C). Weather in December »
Updated: Jul 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year?
During the coldest month in Atwater, January, temperatures average a high of 34.2°F (1.2°C) and a low of 22.3°F (-5.4°C).
How much does it rain?
Throughout the year, there are 151.5 rainfall days, and 31.3" (795mm) of precipitation is accumulated.
When does it snow?
January through April, November and December are months with snowfall.
How many days does it snow?
In Atwater, during the entire year, snow falls for 25.5 days and aggregates up to 9.09" (231mm) of snow.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 4.4h of sunshine.
When is the lowest UV index in Atwater?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
When does it snow the most?
February is the month with the most snowfall. Snow falls for 7 days and accumulates 3.19" (81mm) of snow.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
When it does not snow?
In Atwater, snow does not fall in May through October.
What is the rainiest month?
June is the month with the most rainfall. Rain falls for 16.3 days and accumulates 3.86" (98mm) of precipitation.
When are the longest days?
With an average of 14h and 54min of daylight, June has the longest days of the year.
What month has the most sunshine?
The month with the most sunshine is June, with an average of 10.3h of sunshine.
What are the months with the highest UV index in Atwater?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What time of the year is the hottest in Atwater?
The highest temperatures are recorded in July, with averages reaching a high of 83.3°F (28.5°C) and a low of 66.7°F (19.3°C).
What is the most humid month?
July is the most humid month, with an average relative humidity of 82%.
What is the least humid month?
October is the least humid month, with an average relative humidity of 71%.
What is the driest month in Atwater?
The month with the least rainfall is December, when the rain falls for 8.5 days and typically collects 1.73" (44mm) of precipitation.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 30min of daylight.
Average temperature
Atwater, IL
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (34.2°F).
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (22.3°F).
Average pressure
Atwater, IL
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Atwater, IL
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.1mph - Average wind speed in March:
9.9mph - Average wind speed in April:
9.9mph - Average wind speed in May:
8.1mph - Average wind speed in June:
7.1mph
- Average wind speed in July:
6mph - Average wind speed in August:
6mph - Average wind speed in September:
6.8mph - Average wind speed in October:
8.8mph - Average wind speed in November:
9.6mph - Average wind speed in December:
9.6mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity
Atwater, IL
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Atwater, IL
- Average rainfall in January:
1.85" - Average rainfall in February:
1.81" - Average rainfall in March:
2.48" - Average rainfall in April:
3.58" - Average rainfall in May:
3.54" - Average rainfall in June:
3.86"
The wettest month (with the highest rainfall) is June (3.86").
The driest month (with the least rainfall) is December (1.73").
Average rainfall days
Atwater, IL
- Average rainfall days in January:
7.4 days - Average rainfall days in February:
7.8 days - Average rainfall days in March:
13.7 days - Average rainfall days in April:
15.8 days - Average rainfall days in May:
17.8 days - Average rainfall days in June:
16.3 days
- Average rainfall days in July:
15.7 days - Average rainfall days in August:
13.8 days - Average rainfall days in September:
13.2 days - Average rainfall days in October:
11 days - Average rainfall days in November:
10.5 days - Average rainfall days in December:
8.5 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (7.4 days).
Average snowfall
Atwater, IL
The month with the highest snowfall is February (3.19").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Atwater, IL
- Average snowfall days in January:
8.5 days - Average snowfall days in February:
7 days - Average snowfall days in March:
2.9 days - Average snowfall days in April:
0.4 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.2 days - Average snowfall days in November:
1.6 days - Average snowfall days in December:
4.9 days
The month with the highest number of snowfall days is January (8.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Atwater, IL
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 2min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 3min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
4h and 2min - Average sunshine in February:
4h and 3min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 2min - Average sunshine in May:
9h and 1min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
9h and 5min - Average sunshine in September:
9h and 1min - Average sunshine in October:
6h and 1min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days
Atwater, IL
- Average sunshine days in January:
15.8 days - Average sunshine days in February:
14.3 days - Average sunshine days in March:
13.9 days - Average sunshine days in April:
12.1 days - Average sunshine days in May:
10.6 days - Average sunshine days in June:
10.8 days
- Average sunshine days in July:
12.3 days - Average sunshine days in August:
14.9 days - Average sunshine days in September:
14.7 days - Average sunshine days in October:
18.5 days - Average sunshine days in November:
17.7 days - Average sunshine days in December:
17.9 days
The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is May (10.6 days).
Average UV index
Atwater, IL
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Atwater, IL
The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are June, July, August and September (Cloud cover 30).
Average visibility
Atwater, IL
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Atwater, Illinois, USA
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